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. (No Model.) 3 Sheets-Sheet 1.

A. B. GRII'IEN.

APPARATUS FOR MIXING AERIFORM FLUIDS. No. 320,000. Patented June 10.1885.

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A. B. GRIFFEN.

APPARATUS FOR MIXING AERIFORM FLUIDS.

(No Model.)

No. 320,060. Patented June 16, 1885.

WITNESSES:

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(No Model.) 3 SheetsSheet 3.

A. B. GRIFPEN] APPARATUS FOR MIXING AERIFORM FLUIDS N0. 320,060.Patented June 16, 1885.

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ARTHUR 13. GRIFFEN, OF NEXVARK, NEl/V JERSEY.

SPECIFICATION forming part of Letters Patent No. 320,060, dated June 16,1885.

Application filed February 26, 1884. (No model.)

To aZZ whom it may concern:

Be it known that I, ARTHUR B. GRIFFEN, of the city of Newark, in thecounty of Essex and State of New Jersey, have invented certain new anduseful Improvements in Apparatus for Mixing Aeriform Fluids notheretofore known or used; and I hereby declare the following to be afull, clear description of the same, reference being had to theaccompanying drawings, in which- Figure 1 is a sectional view of myimproved mixer. Fig. 2 is a detached view of the regulator or gateleading into the mixingchamber. Fig. 3 is a view of the apparatusadapted to be used without water. Fig. 4, Sheet 3, shows the relativepositions of the gas and air mixer, the air-pump, and generator.

In Fig. 4, Sheet 3, A represents the gas qualifier or mixer, A theainpump, and G the generator. S is a pipe through which the gasoline ispoured into the generator.

This invention relates to that class of apparatus used for the purposeof mixing the requisite quantity of air with gas generated from gasolinein order that it may be of the proper quality for producing perfectcombustion at the burners. Various devices have been used for thispurpose, all of which are more or less complicated, and designed toreguulate the quantity of air introduced into the mixing-chamber inaccordance with the varying density or richness of the gas coming fromthe gasoline in the generator. \Vhen the generator is freshly chargedwith gasoline, the vapor orfluid generated is very dense or rich, andburns poorly, owing to a lack of oxygen, but as the supply in thegenerator decreases the vapor emitted becomes thinner, and the airpassing through the generator being less saturated with gasoline vapors,it contains sufficient oxygen to produce better combustion at theburner, and consequently the supply of fresh air at what is termed themixing-chamher in this general class of apparatus must vary with thecondition of the gasoline in the generator.

In the apparatus to which my invention relates the vapors of thegasoline are absorbed by air forced by an air-pump through the generatorto the burners, or to what is termed a mixing chamberoreompa1'tment,where it may mingle with additional fresh air, if required,the air for such mixing-chamber being supplied by the same air-pump.

Owing to friction and other causes, the two fluidsviz., the gas from thegenerator and the fresh air from the air-pu mp directalmost invariablyvary in pressure; and my invention has for its object the perfectequalization of the pressure of these two fluids before they are broughttogether at the mixing-chamber, and the provision of a suitable devicefor gaging the quantity of each fluid admitted to the mixing-ehamberwhen under equal pressure.

Various modifications of the same device may be used to utilize theprinciple of my invention, and I have shown in the drawings those whichI have found will most effectually accomplish the required result.

In the drawings, Figure 1, Sheet 1,- shows a compact arrangement of mydevice for equalizing the pressure of the two fluids and mixing themwhen under equal pressure.

In Fig. 1, A is a hollow metal case, preferably tubular in form, whichis divided by partitions intothree compartments, B, O, and D. B is theair-chamber, which is supplied with air directly from the air-pumpthrough the pipe G. D is the gaschamber which is supplied from thegenerator G, Sheet 3, through the pipe H. The compartment 0 containswater to the level A A, floating in which is a gasometer or diaphragm,E. Iassing through the center of the gasometer E, and secured to it, isa rod, N, attached to which are the valves 0 and l and the rod N issecured to a lever, R,at F in such a manner as to allow a slightmovement. The lever B has its fulcrum at n, which is a rod passingacross the compartment 0 and having bearings 011 the shell A. At one endof the lever It is attached the weight w, which serves to evenly balancethe weight of the rod N, and the valves 0 and P, and gasometer E.

I is a pipe leading from the gas-chamber D up under the gasometer ordiaphragm E, and K is a pipe leading from the space under the gasometerto the entrance to what I shall term the mixing-chamber L. At theentrance to the mixingchamber L is a gate or regulator, M. (Shown alsoin Fig. 2, Sheet 1.) This gate is circular in form, and has twoquartersections, Z and m, perforated or provided with openings, as shownin Fig. 2, Sheet 1, over which openings a semicircular disk, V, isarranged to slide by turning a handle, k. The perforatedquarter-sections Z and m cover, respectively, the entrances into themixingchamber L of the air and gas. V is turned so as to equally dividethequarter-sections Z and m, the apertures for the inlet of air and gaswill be equal, and any slight turn of the disk V from such position willdecrease the air-openings and increase the gasopenings, or vice versa.By the construction of valve shown there will always be a space of onequarter-section open for passage of the fluids into the mixing chamber.The proportions of gas and fresh air may be altered; but the combinedquantity of both passing into the mixing-chamber is fixed bybeing of asize to supply fluid for one burner.

The number of small openings in one of the quarter-sections will thenindicate the number of burners the qualifier will supply.

In operation there is a full flow of gas through underthe gasometer ispartially closed, and,

the entrance for air over the gasometer is increased. A reverse movementof the gasometer decreases the passage for air and increases the passagefor gas. The gas passes through the pipe I under the gasometer andthrough the pipe K to the mixing-chamber L through one of the perforatedquarter-sections of the gate M. The air passes from above the gasometerinto the mixing-chamber L, through one of the perforatedquarter-sections of the gate M. The mixture passes from the chamber Lthrough the pipe T to the burners. The gate M is adjusted by the handleis so as to give the requisite proportions of gas and air. If, forinstance, one part air to two parts gas is required, then in aseventy-fi've-light qualifier the disk V would be turned to givetwentyfive openings for air and fifty openings for gas, being one-thirdof the air-openings and twothirds of the gas-openings; but in whateverposition the disk V was placed there would always be seventy-fiveopenings for the combined fluids to pass through into themixing'chamber. If the gate M is thus properly adjusted, and the flow ofgas should tend to be in excess of the demands for the mixture, thepressure of the gas under the gasometer accumulates and is in excess ofthe pressure of air above the gasometer, which causes the gasometer torise When the disk and cut 011'. the supply of gas just enough to reducethe pressure of gas to the pressure of air above the gasometer, thuscausing a perfect equilibrium of pressures on the opposite sides of thegasometer or diaphragm. Whenever, the discharge of air through the gateM tends to be in excess of the demands of the mixture, the pressureaccumulates above the gasometer, which causes the gasometer to fall andcut off the supply of air just enough to reduce to an equilibrium thepressures on the opposite sides of the gasometer or diaphragm. It willbe noticed that whenever the supply of either fluid entering theapparatus is reduced the passage for the other fluid is increased; also,that there is always a free passage through the whole apparatus for oneor both of the fluids.

Any convenient attachment may be used for supplying water to the chamber0 to act as a water-seal for the diaphragm E.

Fig. 3, Sheet 2, shows another form of my apparatus adapted to workwithout water. A is a metal casing divided into three compartments, B,O, and D. About the middle of the compartmentG is a diaphragm, E, ofleather or rubber or other suitable material. N is a rod secured to thediaphragm and having valves 0 and P. G is the air-pipe entering theair-chamber B, and H is the gas-pipe leading from the generator to thecompartment D.

The valve 0 covers the opening 0 from the low the diaphragm. The spaceabove the diaphragm has an outlet atd to the upper half of the gate orregulator M, which may be of the same construction and arrangement asthat described as being used in Fig. 1. The gas this purpose, as I haveshown in separate applications.

I claim- 1. An apparatus for mixing aeriform fluids having ports at theair and gas inlets provided with cut-offs connected by mechanism whichunder the action of the varying volume and pressure of the fluidsreduces the flow of either fluid that is in excess of the demand for themixture and by'the same movement inversely increases the flow of theother fluid, substantially as shown and described.

2. In an apparatus for mixing aeriform fluids, cut-offs at the air andgas inlets conpartment containing the air and separating the fluids,which is operated by the varying volumes and pressure of the fluids, incombination with a gate, M, at the entrance to the mixing-chamberinvariable as to capacity for 15 the passage of the combined fluids, butvariable as to capacity for the passage of each fluid, substantially asshown and described.

4. In an apparatus for mixing aeriform fluids, the gate M, havingperforated quarter 20 sections Z and m, and semicircular disk V,operated by a handle, it, substantially as and for the purposes shownand described.

ARTHUR B. GRIFFEN.

Witnesses:

A. BELL MALCOMSON, J r., ROLAND DE V. PARKER.

